Stainless steel tri-clamp (aka tri-clover or T.C.) fittings are a sanitary, gasketed and clamped connections. T.C. fittings are currently used in almost every commercial brewery and winery in the United States and are becoming increasingly popular in home breweries also. While there are TC to thread adapter fittings, the main benefit of using this style fitting is because they generally are threadless, making them very easy to keep clean and sanitary.